EP1790940A2 - Instrument de surveillance laser - Google Patents

Instrument de surveillance laser Download PDF

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Publication number
EP1790940A2
EP1790940A2 EP06255136A EP06255136A EP1790940A2 EP 1790940 A2 EP1790940 A2 EP 1790940A2 EP 06255136 A EP06255136 A EP 06255136A EP 06255136 A EP06255136 A EP 06255136A EP 1790940 A2 EP1790940 A2 EP 1790940A2
Authority
EP
European Patent Office
Prior art keywords
tilting
tilt
unit
laser
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06255136A
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German (de)
English (en)
Other versions
EP1790940A3 (fr
Inventor
Kamagai Kaoru
Kodaira Jun-Ichi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Topcon Corp
Original Assignee
Topcon Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Topcon Corp filed Critical Topcon Corp
Publication of EP1790940A2 publication Critical patent/EP1790940A2/fr
Publication of EP1790940A3 publication Critical patent/EP1790940A3/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means
    • G01C15/004—Reference lines, planes or sectors

Definitions

  • the present invention relates to a laser surveying instrument.
  • Embodiments relate to such an instrument for forming a horizontal plane or a tilted plane as desired by projecting a laser beam by rotary irradiation.
  • Reference lines and reference planes are indispensable in the execution of construction work and civil engineering work, and the reference line and plane are formed as the result of projection of the laser beam by rotary irradiation.
  • a laser surveying instrument has been known, which can form a horizontal reference plane and also can form a tilt reference plane with a desired tilt angle, and such surveying instrument is described in JP-A-6-26861 or in JP-A-2001-280964 .
  • the laser surveying instrument 10 as disclosed in JP-A-6-26861 comprises, as shown in Fig. 5, a projector 1 for projecting a laser beam 13 by rotary irradiation and tiltable in two directions, two sets of tilting mechanisms 2 for tilting the projector 1 in two directions, two sets of fixed tilt detectors 4 provided on a plane 3 crossing perpendicularly the axis of the projector 1 and for detecting tiltings in two directions, two sets of tiltable tilt detectors 6 crossing the axis of the projector 1 and arranged on a tiltable plane 5 which is enabled to tilt in two directions, and two sets of tilt setting mechanisms 7 for tilting the tiltable plane 5 in two directions.
  • the tiltable tilt detector 6 is aligned with the fixed tilt detector 4 so that the fixed tilt detector 4 indicates horizontal direction and the tiltable tilt detector 6 indicates horizontal direction.
  • the projector 1 is leveled so that the fixed tilt detector 4 and the tiltable tilt detector 6 detect horizontal direction, and a horizontal reference plane is obtained by projecting the laser beam 13 from the projector 1 by rotary irradiation.
  • the tiltable tilt detector 6 is tilted by the tilt setting mechanism 7 based on the fixed tilt detector 4 as a reference. Tilting of the tiltable til detector 6 can be attained when the tilt setting mechanism 7 gives mechanical displacement to the tiltable plane 5.
  • the projector 1 By leveling the projector 1 by means of the tilting mechanism 2 in such manner that the tiltable tilt detector 6 which was tilted indicates horizontal direction, the projector 1 can be tilted in a direction as desired. And by projecting the laser beam 13 from the projector 1 by rotary irradiation, a tilt reference plane can be obtained.
  • the laser surveying instrument 15 disclosed in JP-A-2001-280964 comprises, as shown in Fig. 6, a projector 1 for projecting a laser beam 13 by rotary irradiation and tiltable in two directions, two sets of tilting mechanisms 2 for tilting the projector 1 in two directions, a first tilt setting unit 8a provided on the projector 1 and capable to set a tilt angle of a first direction with respect to the projector 1, and a second tilt setting unit 8b (not shown) provided on the projector 1 and capable to set a tilt angle of a second direction perpendicularly crossing the first direction with respect to the projector 1.
  • the first tilt setting unit 8a comprises a first tilt angle detector 9a, first tilt sensors 11a and 12a, and a first tilt setting mechanism 7a for tilting the first tilt angle detector 9a.
  • the second tilt setting unit 8b comprises a second tilt angle detector 9b (not shown), second tilt sensors 11b and 12b (both not shown), and a second tilt setting mechanism 7b (not shown) for tilting the second tilt angle detector 9b.
  • tilt setting is performed by the laser surveying instrument 15
  • an angle detected by the first tilt angle detector 9a is tilted in opposite direction with the same numerical value as the set angle by the tilt setting mechanism 7a.
  • the projector 1 is tilted by the tilt mechanism 2 so that the first tilt sensor 11a detects the horizontal direction.
  • the setting of the tilted plane is completed.
  • the tilt setting mechanisms are needed respectively for two tilting directions, and the mechanism has complicated structure. Further, the accuracy of the setting of the tilt angle depends on mechanical accuracy of the mechanical components. There is a problem that the accuracy of the setting angle may be affected, when mechanical components become worn and the like as time elapses.
  • the setting of the tilt angle is performed by a tilt angle detector.
  • the accuracy of the setting of the tilt angle depends on the mechanical accuracy of the mechanical components.
  • the decrease of the setting accuracy due to wearing and the like can be avoided. While problems lie in that complicated mechanism is required because tilt setting mechanisms are needed for two tilting directions respectively.
  • a laser surveying instrument comprising a laser projector for projecting a laser beam by rotary irradiation and designed as tiltable, a tilting unit for tilting the laser projector, a rotating unit for integrally rotating the tilting unit and the laser projector in horizontal direction, a tilt setting unit for tilting the laser projector with respect to the rotating unit and for setting a target tilt angle, a tilt angle detector for detecting tilting of the laser projector, tilt sensors provided on the tilt setting unit in two directions perpendicularly crossing and for detecting horizontal direction, a horizontal angle detector for detecting horizontal rotation angle of the rotating unit, and an arithmetic control unit for controlling rotation angle of the rotating unit based on detection results of the tilt sensors and based on detection results of the horizontal angle detector.
  • the tilting unit may comprise an X-direction tilting unit and a Y-direction tilting unit running perpendicularly to each other, and wherein the tilting unit levels the laser projector in vertical direction by leveling the laser projector in such manner that the tilt sensors detect horizontal direction in the condition that the tilt setting unit is at a reference position.
  • tilting arms may extend in horizontal direction from the laser projector, the tilting unit tilts the laser projector via the tilting arms, and the tilt angle detector detects tilting of the tilting arms.
  • the tilt angle detector may comprise an absolute pattern moving up or down to follow the movement of the tilting arms and comprises a position detector fixedly provided to face to the absolute pattern, and a tilt angle from the reference position of the tilting arms is detected by detecting the absolute pattern by the position detector.
  • a laser surveying instrument which comprises a laser projector for projecting a laser beam by rotary irradiation and designed as tiltable, a tilting unit for tilting the laser projector, a rotating unit for integrally rotating the tilting unit and the laser projector in horizontal direction, a tilt setting unit for tilting the laser projector with respect to the rotating unit and for setting a target tilt angle, a tilt angle detector for detecting tilting of the laser projector, tilt sensors provided on the tilt setting unit in two directions perpendicularly crossing and for detecting horizontal direction, a horizontal angle detector for detecting horizontal rotation angle of the rotating unit, and an arithmetic control unit for controlling rotation angle of the rotating unit based on detection results of the tilt sensors and based on detection results of the horizontal angle detector.
  • a tilt reference plane can be set by a laser surveying instrument designed in simple construction.
  • a laser surveying instrument 20 primarily comprises a base unit 21, a rotating unit 22 rotatably mounted on the base unit 21, a laser projector 23 tiltably mounted on the rotating unit 22, a rotary irradiation unit 24 rotatably provided on upper end of the laser projector 23, a horizontal angle detector 25 arranged between the base unit 21 and the rotating unit 22, a tilting unit 26 provided between the rotating unit 22 and the laser projector 23, a tilt setting unit 27 provided on the laser projector 23, a control unit 28, and an operation unit 30.
  • Mechanical components unit including the rotating unit 22, the laser projector 23, the rotary irradiation unit 24, the tilt setting unit 27, etc.
  • the operation unit 30 is integrated with the case 102 or the operation unit 30 is arranged separately so that the operation unit 30 can be remotely controlled, and comprises operation buttons, a display unit, etc.
  • the base unit 21 comprises a base 31 to support the laser surveying instrument 20, and a support shaft 32 is protruded on the base 31.
  • the rotating unit 22 has a hollow rotation shaft 34, and the support shaft 32 is internally engaged with the rotation shaft 34 via a bearing 33.
  • the rotation shaft 34 is rotatably freely supported by the support shaft 32.
  • a revolving motor 35 is mounted on the base 31, and a revolving driving gear 36 is attached to an output shaft of the revolving motor 35.
  • a revolving driven gear 37 is provided on the rotation shaft 34. The revolving driven gear 37 is geared with the revolving driving gear 36, and the rotation shaft 34 is revolved by the revolving motor 35.
  • the horizontal angle detector 25 In the present embodiment, an absolute encoder with a composition as given below is used as the horizontal angel detector 25.
  • a horizontal angle protractor 38 On a lower end of the rotation shaft 34, a horizontal angle protractor 38 is provided.
  • Horizontal angle detectors 39 and 40 are provided on the base 31 so as to dispose at a position opposite to the horizontal angle protractor 38.
  • the horizontal angle detectors 39 and 40 are arranged on the same circumference at the positions separated from each other by an angle of 180°.
  • Two light emitters 41 and 42 are arranged to face to the horizontal angle detectors 39 and 40 respectively, and lights emitted from each of the light emitters 41 and 42 are received by the horizontal angle detectors 39 and 40 respectively via the horizontal angle protractor 38.
  • the horizontal angle detector 39 and the horizontal angle detector 40 are at positions separated from each other by an angle of 180°. Error caused by decentering can be offset as an average value is obtained from the results of detection of both horizontal angle detector, and angle detection can be performed with high accuracy.
  • An angle scale is marked on the horizontal angle protractor 38, and the angle scale is changed with a predetermined cycle.
  • the angle scale is an absolute pattern and the absolute pattern enable to achieve high resolution and high accuracy by detecting the scale and cyclic change.
  • a light emitting diode is used as each of the light emitters 41 and 42.
  • a device such as CCD is used so that it can detect a light and also can recognize a pattern.
  • the laser projector 23 has a hollow body tube 44.
  • a semi-spherical unit 45 is formed between upper half and lower half of the body tube 44, and the lower half is inserted in the hollow portion of the rotation shaft 34.
  • On an upper end of the rotation shaft 34 a spherical recess 46 is formed.
  • the semi-spherical unit 45 is engaged with the spherical recess 46 and the semi-spherical unit 45 and the spherical recess 46 make up together a spherical receiving seat 47, and the body tube 44 is tiltably in arbitrary direction supported on the rotation shaft 34 via the spherical receiving seat 47.
  • a laser light source 48 and a condenser lens 49 are provided within the body tube 44.
  • An optical axis 50 of the laser light source 48 and the condenser lens 49 is aligned with the axis of the body tube 44, and the laser beam is projected along the optical axis 50 as parallel luminous fluxes.
  • a rotating body 52 is rotatably and externally engaged via a bearing 51.
  • an aperture 53 coaxial with the optical axis 50 is drilled.
  • a pentagonal prism 54 is mounted on the optical axis 50. The pentagonal prism 54 deflects the laser beam emitted from the laser light source 48 in perpendicular direction (i.e. in horizontal direction) and projects the laser beam.
  • a scanning motor 55 is provided on the body tube 44.
  • a scanning driving gear 56 is engaged with output shaft of the scanning motor 55, and the scanning driving gear 56 is geared with a scanning driven gear 57, which is provided on the rotating body 52.
  • tilting arms 58 and 59 are extended in two horizontal directions running perpendicularly to each other.
  • engaging pins 60 and 61 are protruded, and the tilting arms 58 and 59 are connected with the tilting unit 26 via the engaging pins 60 and 61 respectively.
  • An axis (X-axis) of the tilting arm 58 is aligned with collimating direction of the coarse sight 103.
  • the tilting unit 26 comprises an X-axis tilting mechanism 63 and a Y-axis tilting mechanism 64 (not shown).
  • the X-axis tilting mechanism 63 and the Y-axis tilting mechanism 64 have the same structure. In the following, description will be given only on the X-axis tilting mechanism 63.
  • a tilting frame 65 is mounted on the rotation shaft 34, and a tilting motor 66 is provided on the tilting frame 65.
  • a tilting screw 67 is rotatably provided on the tilting frame 65.
  • the tilting screw 67 runs in parallel to the rotation shaft 34.
  • One end (a lower end in the figure) is protruded, and a tilting driven gear 68 is engaged with the lower end.
  • the tilting driven gear 68 is geared with a tilting driving gear 69 mounted on an output shaft of the tilting motor 66.
  • a tilting member 71 is screwed with the tilting screw 67 via thread.
  • the tilting member 71 is slidably engaged with a guide (not shown) provided on the tilting frame 65 and the tilting member 71 is prevented from turning.
  • an engaging pin 72 is protruded.
  • the engaging pin 72 and the engaging pin 60 are touched to the tilting member 71.
  • the engaging pin 60 and the engaging pin 72 are pressed against each other by a spring (not shown) so that both pins are not separated from each other, and the engaging pin 60 and the engaging pin 72 are designed to be slidable with respect to each other.
  • a linear sensor 74 is provided as shown in Fig. 3.
  • a light emitting source 75 such as light emitting diode is mounted on the tilting member 71 and a linear scale 76 facing to the light emitting source 75 are mounted on the tilting member 71.
  • a cyclically changing scale absolute pattern
  • the light emitted from the light emitting source 75 is projected and passes through the linear scale 76.
  • a position detector 77 is mounted at a position opposite to the tilting member 71. The position detector 77 detects a light, which has passed through the linear scale 76.
  • the position detector 77 is a pattern detecting element, e.g. a CCD sensor, which can detect a cyclically changing pattern of the linear scale 76.
  • the linear scale 76, the position detector 77, etc. make up together an absolute linear encoder.
  • the linear sensor 74 is enabled to achieve high resolution and high accuracy by detecting the scale and cyclic change.
  • An output signal of the linear scale 76 matches a tilt angle of the body tube 44 with respect to the rotation shaft 34.
  • the linear sensor 74 can detect a reference position and also can detect an angle (an absolute angle) from the reference position.
  • the laser surveying instrument 20 is installed on a horizontal plane. With the optical axis 50 in vertical position, a position is detected, and the position detected by the position detector 77 is set as a reference position.
  • another tilting arm 59 is also connected with the Y-axis tilting mechanism 64 with the same structure.
  • An upper arm 78 is extended in horizontal direction from an upper position of the semi-spherical unit 45 of the body tube 44, and a lower arm 79 is extended in parallel to the upper arm 78 from a lower end of the body tube 44.
  • the tilt setting unit 27 is provided between the lower arm 79 and the upper arm 78.
  • a tilt setting motor 81 is provided, and a tilt setting screw 82 is rotatably provided.
  • the tilt setting screw 82 runs in parallel to the optical axis 50.
  • One end (a lower end in the figure) is protruded, and a tilt setting driven gear 83 is engaged with the lower end.
  • the tilt setting driven gear 83 is geared with a tilt setting driving gear 84 mounted on an output shaft of the tilt setting motor 81.
  • a tilt setting member 85 is screwed with the tilt setting screw 82, and the tilt setting member 85 is slidably engaged with a guide (not shown), which is provided between the upper arm 78 and the lower arm 79, and the tilt setting member 85 is prevented from turning.
  • An engaging pin 86 is protruded on the tilt setting member 85.
  • a tilt setting arm 88 is pivotally attached at a predetermined position of the lower half of the laser projector 23, and the tilt setting arm 88 can be rotated freely around the center line, which perpendicularly crosses the optical axis 50.
  • an engaging pin 89 is protruded.
  • the engaging pin 89 is touched to the engaging pin 86.
  • the engaging pin 86 and the engaging pin 89 are pressed against each other by a spring (not shown) so that both pins are not separated from each other, and the engaging pin 89 and the engaging pin 86 are slidable with respect to each other.
  • the axis of the tilt setting arm 88 and the axis of the tilting arm 58 and the engaging pin 60 are arranged on the same plane.
  • a tilt setting protractor 91 is provided, which is designed in arc shape and coaxial with rotation center of the tilt setting arm 88, and an X-axis tilt sensor 92 and a Y-axis tilt sensor 93 are mounted on the tilt setting arm 88.
  • a window 94 is formed in such manner that the window 94 does not interfere with the tilt setting arm 88, the X-axis tilt sensor 92, and Y-axis tilt sensor 93.
  • a setting angle detector 95 is provided in parallel to the tilt setting protractor 91, and the setting angle detector 95 is so arranged that the setting angle detector 95 receives a light emitted from a light source (not shown) through the tilt setting protractor 91.
  • Angular scale is marked on the tilt setting protractor 91, and angular scale is designed as an absolute pattern, which is changed with a predetermined cycle.
  • the setting angle detector 95 can perform detection with high resolution and high accuracy.
  • a pattern detecting element such as CCD element is used, which can detect light and also can recognize a pattern.
  • the setting angle detector 95 can detect the reference position.
  • the angular scale of the tilt setting protractor 91 is designed to indicate an angle from the reference position, and the setting angle detector 95 can detect an angle from the reference position (absolute angle).
  • Fig. 2 shows the control unit 28. Detection results from the horizontal angle detectors 39 and 40, the position detector 77, the X-axis tilt sensor 92, the Y-axis tilt sensor 93 and the setting angle detector 95 are sent to an arithmetic operation control unit 29. Based on the detection results from the horizontal angle detectors 39 and 40, the position detector 77, the X-axis tilt sensor 92, the Y-axis tilt sensor 93, and the setting angle detector 95, the arithmetic operation control unit 20 drives and controls the revolving motor 35 via a revolving motor control unit 96. The scanning motor 55 is driven and controlled via a scanning motor control unit 97.
  • the tilting motor 66 (X-axis) and the tilting motor 66 (Y-axis) are driven and controlled via tilting motor control units 98 and 98.
  • the tilt setting motor 81 is driven and controlled via a tilt setting control unit 99, and the laser light source 48 is driven and controlled via a laser light source control unit 100.
  • the tilt setting in a predetermined direction means composite tilting synthesized in case that tilting in two directions is set (to be described later) and a direction of such composite tilting.
  • the tilt setting mechanism is mono-axial, and it is necessary to direct in the direction of such composite tilting.
  • the base 31 is installed on horizontal plane, and then the axis of the support shaft 32 is erected in vertical direction, and the rotation shaft 34 is rotated around the vertical axis.
  • the tilt setting motor 81 is driven, and the tilt setting arm 88 is set to the reference position.
  • the reference position of the tilt setting arm 88 can be set by detecting the reference position of the tilt setting protractor 91 by using the setting angle detector 95.
  • the X-axis tilting mechanism 63 and the Y-axis tilting mechanism 64 (not shown) are driven.
  • the body tube 44 is tilted via the tilting arms 58 and 59, and it is so arranged that the X-axis tilt sensor 92 and the Y-axis tilt sensor 93 detect horizontal direction, i.e. the laser projector 23 is set in vertical direction.
  • the tilt setting motor 81 is driven, and the tilt setting member 85 is moved in vertical direction via the tilt setting driving gear 84 and the tilt setting driven gear 83, and the tilt setting arm 88 is tilted via the engaging pin 86 and the tilt setting member 85.
  • Tilt angle of the tilt setting arm 88 is detected by the setting angle detector 95, and an angle detected by the setting angle detector 95 is aligned with the setting angle.
  • the tilting arm 58 By driving the X-axis tilting mechanism 63 connected with the tilting arm 58 arranged on the same plane as the tilt setting arm 88, the tilting arm 58 is tilted.
  • the tilting motor 66 is driven, and the tilting screw 67 is rotated via the tilt driving gear 69 and the tilt driven gear 68.
  • the tilting member 71 is moved in vertical direction.
  • the tilting arm 58 i.e. the body tube 44, is tilted via the engaging pin 72 and engaging pin 60.
  • the tilt setting unit 27 is also tilted integrally with the tilting of the body tube 44.
  • the result of tilt detection from the X-axis tilt sensor 92 and the Y-axis tilt sensor 93 is sent to the arithmetic operation control unit 29 by feedback, and the tilting motor 66 is driven so that the X-axis tilt sensor 92 detects the horizontal direction.
  • the laser projector 23 is tilted at a setting angle.
  • the rotation shaft 34 is rotated via the revolving driving gear 36 and the revolving driven gear 37, and the axis of the tilting arm 58 is directed in tilting direction, and the tilting direction is set.
  • a light is emitted from the laser light source 48, and the scanning motor 55 is driven.
  • the laser beam is projected within the preset tilted plane by rotary irradiation, and a tilt reference plane as desired is formed.
  • composite tilt plane means a case where there are tiltings in two directions.
  • the composite tilt plane is a plane tilted further with respect to a predetermined tilted plane.
  • the composite tilt plane is just like a slope and a water drain ditch running on a slope.
  • the water drain ditch has the same tilting as that of the slope, and the tilting of the water drain ditch is tilted in perpendicular direction more than the tilting of the slope. That is to say, the water drain ditch has a composite tilting plane tilted in two directions.
  • the laser surveying instrument 20 forms a composite tilt reference plane just as in the case where a water drain ditch is constructed.
  • the present surveying instrument is a mechanism with mono-axial tilting mechanism on a horizontal rotation shaft.
  • the rotation center of the rotation shaft 34 is tilted with respect to the vertical line.
  • tilt angle of the rotation shaft 34 is added to or subtracted from the present tilting direction, and this causes an error in the preset tilting direction.
  • the error in the preset set tilting direction is corrected.
  • tilting is set by the tilting mechanism so that the tilt sensor indicates zero.
  • the laser surveying instrument 20 is installed by aligning the laser surveying instrument 20 in one of the tilting directions of the composite tilting (e.g. in a direction of the slope) (Step: 01).
  • the direction is aligned with the coarse sight 103 by collimating an object placed at a predetermined position, for instance.
  • the laser surveying instrument 20 In the condition that the laser surveying instrument 20 is set in tilting direction, it is the condition where the tilting arm 58 (X-axis) is aligned with the tilting direction.
  • rotation angle in horizontal direction of the tilting arm 58 with respect to the base unit 21 is detected by the horizontal angle detectors 39 and 40. The detected rotation angle is inputted as a reference position to the arithmetic operation control unit 29 and is stored.
  • Tilt angles A and B of the composite tilting are inputted (Step 02).
  • the symbol A represents a tilt angle of a slope
  • B represents a tilt angle of the water drain ditch.
  • Composite tilt angle on composite tilt reference plane tilted in two directions is calculated as a tilt angle ⁇ with respect to horizontal direction and calculated as a horizontal rotation angle ⁇ from the reference position.
  • a value detected by the setting angle detector 95 is the reference position.
  • leveling is performed so that the X-axis tilt sensor 92 and the Y-axis tilt sensor 93 detect horizontal direction respectively.
  • the optical axis 50 is in vertical condition, and the laser beam projected from the rotary irradiation unit 24 forms a horizontal reference plane.
  • the position detectors 77 (X-axis) and 77 (Y-axis) detect angles.
  • the detection results are inputted to the arithmetic operation control unit 29 and are stored.
  • the values detected by the position detectors 77 and 77 are a tilt angle ⁇ of X-axis and a tilt angle ⁇ of Y-axis with respect to the plane, on which the laser surveying instrument 20 is installed.
  • the horizontal rotation angle ⁇ is converted to a horizontal rotation angle ⁇ in the corrected preset tilting direction (Step 04).
  • the rotating unit 22 is rotated by an angle of ⁇ in the tilting direction so that X-axis (axis of the tilting arm 58) is to be in composite tilting direction (Step 05).
  • the tilt setting unit 27 is driven, and the tilt setting arm 88 is tilted by driving the tilt setting motor 81 so that the reading scale on the tilt setting protractor 91 is to be at an angle in reverse direction of the tilt angle ⁇ (i.e. - ⁇ ) (Step 06).
  • the tilting arms 58 and 59 are tilted so that the horizontal tilt sensor 92 and the Y-axis tilt sensor 93 detect horizontal position.
  • the reference plane formed by rotary irradiation of the laser beam from the laser projector 23 is tilted at the preset tilt angle ⁇ with respect to the horizontal direction, and the tilting direction of the reference plane is set to ⁇ .
  • a composite tilting is set where tilt angles of X-axis and Y-axis at the reference position are indicated by A and B.
  • the tilt reference plane can be set in arbitrary tilting direction and at arbitrary tilt angle.
  • linear sensor 74 it may be designed in such manner that an encoder is provided on the tilting motor 66 or on the tilting screw 67, and the rotation angle is detected and the rotation angle is converted to the tilt angle of the tilting arm 58. Also, it may be designed in such manner that an encoder is provided on the revolving motor 35 instead of the horizontal angle protractor 38 and the horizontal angle detectors 39 and 40 so that the rotation angle of the rotating unit 22 can be detected. Further, it may be designed in such manner that an encoder is provided on the tilt setting motor 81 instead of the tilt setting protractor 91 and the setting angle detector 95 so that the tilt angle of the tilt setting arm 88 can be detected.
  • the angle is detected by the tilt setting protractor 91, the setting angle detector 95, the position detector 77, and the linear scale 76. Then, no displacement over time occurs as in the case of positioning based on a mechanical stopper, and high accuracy and good repeatability can be ensured for long time.
  • the tilt reference plane which is tilted 2-dimensionally, can be set by a set of tilt setting units 27, and this contributes to simpler design of the mechanism.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Length Measuring Devices By Optical Means (AREA)
EP06255136A 2005-11-08 2006-10-05 Instrument de surveillance laser Withdrawn EP1790940A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005323906A JP4913388B2 (ja) 2005-11-08 2005-11-08 レーザ測量装置

Publications (2)

Publication Number Publication Date
EP1790940A2 true EP1790940A2 (fr) 2007-05-30
EP1790940A3 EP1790940A3 (fr) 2011-08-10

Family

ID=37948620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06255136A Withdrawn EP1790940A3 (fr) 2005-11-08 2006-10-05 Instrument de surveillance laser

Country Status (4)

Country Link
US (1) US7433028B2 (fr)
EP (1) EP1790940A3 (fr)
JP (1) JP4913388B2 (fr)
CN (1) CN1963392B (fr)

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EP2781879A1 (fr) 2013-03-19 2014-09-24 Leica Geosystems AG Système de laser de construction constitué d'un laser rotatif et d'un récepteur laser, doté d'une fonctionnalité de détermination automatique de la direction du récepteur laser
EP2781880A1 (fr) 2013-03-19 2014-09-24 Leica Geosystems AG Système de laser de construction comportant une fonctionnalité de recalibrage s'exécutant de manière au moins partiellement automatique pour une fonctionnalité de mise à l'horizontale du rayon

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JP5456532B2 (ja) * 2010-03-25 2014-04-02 株式会社トプコン 回転レーザ装置及び回転レーザシステム
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JP6539501B2 (ja) * 2015-05-28 2019-07-03 株式会社トプコン 測量装置
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CN104990541A (zh) * 2015-07-16 2015-10-21 张萍 一种建筑工程用测量系统
JP6867244B2 (ja) * 2017-06-28 2021-04-28 株式会社トプコン 測量機の通信管理システム
CN109211124B (zh) * 2018-10-31 2023-11-21 浙江德清龙立红旗制药机械有限公司 冲模尺寸激光检测机构
CN116391107A (zh) 2020-12-01 2023-07-04 米沃奇电动工具公司 激光水平仪接口和控制件

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US20070103672A1 (en) 2007-05-10
CN1963392B (zh) 2010-06-16
EP1790940A3 (fr) 2011-08-10
JP2007132716A (ja) 2007-05-31
CN1963392A (zh) 2007-05-16
US7433028B2 (en) 2008-10-07

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